Anonymous, Calif. Fungi
Herbarium of the University of California. [1- ? 1425]

Cornell University, Plant Pathology Herbarium
Catalog #: CaliforniaF.00328
s.n.
Microsphaera alni (DC.) G. Winter

Washington State University, Charles Gardner Shaw Mycological Herbarium
Catalog #: WSP35291
J. P. Tracy s.n. 30 September 1928
Microsphaera alni (DC.) G. Winter
United States, California, Humboldt, head of South Yager Creek

Michigan State University Herbarium
Catalog #: MSC0212968
J. P. Tracy s.n. 30 September 1928
Microsphaera alni (DC.) G. Winter
United States, California, Humboldt, Head of South Yager Creek

University of California Berkeley, University Herbarium
Catalog #: UC538837
J. P. Tracy s.n. 30 September 1928
Microsphaera extensa var. curta U. Braun
USA, California, Humboldt, Head of South Yager Creek

Field Museum of Natural History
Catalog #: C0285806F
J.P. Tracy #s.n. 30 September 1930
Microsphaera alni (DC.) G. Winter
USA, California, Humboldt, Head of South Yager Creek

Iowa State University, Ada Hayden Herbarium
Catalog #: ISC-F-0087715
J.P. Tracy #s.n. 30 September 1928
Microsphaera extensa Cooke & Peck
USA, California, Humboldt, Head of South Yager Creek

University of North Carolina at Chapel Hill Herbarium
Catalog #: NCU-F-0015482
Tracy, Joseph P. #s.n. 30 September 1928
Microsphaera alni (DC.) G. Winter
United States, California, Humboldt, Head of South Yager Creek.